Investments in affiliates and investments in available-for-sale securities (Table) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Navios Partners      
Balance sheet      
Cash and cash equivalents, including restricted cash $ 29,933 $ 25,088  
Current assets 60,306 56,349  
Non-current assets 1,244,996 1,212,231  
Current liabilities 54,247 98,950  
Long- term debt including current portion, net 493,463 523,776  
Non-current liabilities 483,345 489,421  
Income Statement      
Revenue 211,652 190,524 $ 223,676
Net (loss)/ income before non-cash change in fair value of Junior Loan I and Junior Loan II (15,090) (52,549) 41,805
Net (loss)/income (15,090) (52,549) 41,805
Navios Europe I      
Balance sheet      
Cash and cash equivalents, including restricted cash 19,185 10,785  
Current assets 22,417 15,980  
Non-current assets 145,940 169,925  
Current liabilities 21,284 18,490  
Long- term debt including current portion, net 75,472 86,060  
Non-current liabilities 125,283 155,387  
Income Statement      
Revenue 37,468 40,589 41,437
Net (loss)/ income before non-cash change in fair value of Junior Loan I and Junior Loan II (20,778) (2,174) (1,347)
Net (loss)/income 9,762 16,137 (1,118)
Navios Europe II      
Balance sheet      
Cash and cash equivalents, including restricted cash 16,882 16,916  
Current assets 28,403 19,487  
Non-current assets 195,784 232,363  
Current liabilities 25,805 24,126  
Long- term debt including current portion, net 109,223 119,234  
Non-current liabilities 164,276 184,530  
Income Statement      
Revenue 38,633 30,893 20,767
Net (loss)/ income before non-cash change in fair value of Junior Loan I and Junior Loan II 22,749 (25,062) 1,673
Net (loss)/income (9,086) $ (34,059) $ 77,252
Navios Containers      
Balance sheet      
Cash and cash equivalents, including restricted cash 14,501    
Current assets 21,371    
Non-current assets 245,440    
Current liabilities 49,559    
Long- term debt including current portion, net 119,033    
Non-current liabilities 76,534    
Income Statement      
Revenue 39,188    
Net (loss)/ income before non-cash change in fair value of Junior Loan I and Junior Loan II 2,638    
Net (loss)/income $ 2,638